[Sloth]

The difference is that you have a much more personal relationship with the server than you have, say, with the clerk at the local supermarket or drugstore.

No, I do not. In both cases I am a customer who simply wants to exchange money for goods and services.

[grand wazoo]

No, I do not. In both cases I am a customer who simply wants to exchange money for goods and services.

Then go get take out.

Don't got to a "nice" sit-down restaurant that offers a level of service where the wait staff expects to receive a tip.

[livius]

You can get good service or bad service. Which do you want?